title: Superior activity of N-formimidoyl thienamycin against gentamicin-resistant Pseudomonas aeruginosa.
abstract: N-Formimidoyl thienamycin (N-F-thienamycin), cefotaxime, moxalactam, and cefsulodin were tested by agar dilution against 125 isolates of Pseudomonas aeruginosa, Serratia marcescens, Klebsiella pneumoniae, and Providencia stuartii. Against gentamicin-susceptible P. aeruginosa, N-F-thienamycin and cefsulodin were most active. Only N-F-thienamycin inhibited gentamicin-resistant P. aeruginosa at less than or equal to 4 microgram/ml. N-F-thienamycin's activity equaled or surpassed that of the other antibiotics tested against both the gentamicin-susceptible and -resistant Enterobacteriaceae.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D004352:Drug Resistance, Microbial; D005839:Gentamicins / Q000494:pharmacology*; D015378:Imipenem; D007769:Lactams / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D011550:Pseudomonas aeruginosa / Q000187:drug effects*
chemical_list: D000900:Anti-Bacterial Agents; D005839:Gentamicins; D007769:Lactams; D015378:Imipenem